Skip to content

YARA · Malpedia signator rules

MALPEDIA_Win_Kimjongrat_Auto

autogenerated rule brought to you by yara-signator

MalwareKimjongratMalpedia signator rulesCreative Commons Attribution-ShareAlike 4.0Compiles with YARA-X
Author
Felix Bilstein - yara-signator at cocacoding dot com
Date
2026-05-04
Modified
2026-05-18
Score / Quality
75 / 75

What this rule detects

autogenerated rule brought to you by yara-signator

Associated malware family: Kimjongrat.

It defines 10 patterns (0 text, 10 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

win-kimjongrat-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Kimjongrat_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "5566b500-a4f9-59c1-9949-5a48614fe2fa"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.kimjongrat"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.kimjongrat_auto.yar#L1-L134"
		license_url = "N/A"
		logic_hash = "ae4aa27f3b130f9a25de75177de58ad1ac53d730877055e018cbcb8dd9175611"
		score = 75
		quality = 75
		tags = "FILE"
		version = "1"
		tool = "yara-signator v0.6.0"
		signator_config = "callsandjumps;datarefs;binvalue"
		malpedia_rule_date = "20260422"
		malpedia_hash = "a182e35da64e6d71cb55f125c4d4225196523f14"
		malpedia_version = "20260504"
		malpedia_license = "CC BY-SA 4.0"
		malpedia_sharing = "TLP:WHITE"

	strings:
		$sequence_0 = { ffb68c010000 8d85b4f9ffff ffb688010000 57 50 e8???????? 8b8db0f9ffff }
		$sequence_1 = { eb07 c605????????00 56 e8???????? 83c404 5e 5b }
		$sequence_2 = { eb4e c6841528ffffff28 eb44 c6841528ffffff24 eb3a c6841528ffffff5d eb30 }
		$sequence_3 = { eb03 53 6a7a 57 e8???????? 8945e4 83c410 }
		$sequence_4 = { 8b4508 8b5df4 83c45c 40 50 6a48 53 }
		$sequence_5 = { e9???????? c6840de8faffff23 e9???????? c6840de8faffff21 e9???????? c6840de8faffff25 e9???????? }
		$sequence_6 = { ff4624 89460c 5e 5d c3 33c0 5e }
		$sequence_7 = { e9???????? c6840d98a5ffff76 e9???????? c6840d98a5ffff65 e9???????? c6840d98a5ffff75 e9???????? }
		$sequence_8 = { 8d45e8 50 53 ff75e0 e8???????? 8bf0 83c410 }
		$sequence_9 = { e8???????? 83c404 ff750c 3b7dd4 7469 8b4514 3c25 }

	condition:
		7 of them and filesize < 1572864
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ ffb68c010000 8d85b4f9ffff ffb688010000 57 50 e8???????? 8b8db0f9ffff }
$sequence_1hex{ eb07 c605????????00 56 e8???????? 83c404 5e 5b }
$sequence_2hex{ eb4e c6841528ffffff28 eb44 c6841528ffffff24 eb3a c6841528ffffff5d eb30 }
$sequence_3hex{ eb03 53 6a7a 57 e8???????? 8945e4 83c410 }
$sequence_4hex{ 8b4508 8b5df4 83c45c 40 50 6a48 53 }
$sequence_5hex{ e9???????? c6840de8faffff23 e9???????? c6840de8faffff21 e9???????? c6840de8faffff25 e9???????? }
$sequence_6hex{ ff4624 89460c 5e 5d c3 33c0 5e }
$sequence_7hex{ e9???????? c6840d98a5ffff76 e9???????? c6840d98a5ffff65 e9???????? c6840d98a5ffff75 e9???????? }
$sequence_8hex{ 8d45e8 50 53 ff75e0 e8???????? 8bf0 83c410 }
$sequence_9hex{ e8???????? 83c404 ff750c 3b7dd4 7469 8b4514 3c25 }

Condition

7 of them and filesize < 1572864

In plain words (Heuristic)

  • The file must be smaller than 1572864 (a cheap guard that skips large files).
  • At least 7 patterns in the rule must match.

Test this rule in your browser

Drop a file to scan it with this rule using YARA-X compiled to WebAssembly. Nothing is uploaded.

Drop a file here or click to chooseScanned locally with YARA-X. Files up to 200 MB.

Open in editor

References

Licence & attribution

Author: Felix Bilstein - yara-signator at cocacoding dot com

Source repository: Malpedia signator rules @ c901f97b7d

Licence: Creative Commons Attribution-ShareAlike 4.0 (repository licence)

Original rule

Mirrored via YARA Forge 20260927, which prefixes rule names with the source and adds normalised meta fields.

Rule id: 5566b500-a4f9-59c1-9949-5a48614fe2fa

Metadata

version1
toolyara-signator v0.6.0
signator_configcallsandjumps;datarefs;binvalue
malpedia_rule_date20260422
malpedia_hasha182e35da64e6d71cb55f125c4d4225196523f14
malpedia_version20260504
malpedia_licenseCC BY-SA 4.0
malpedia_sharingTLP:WHITE

Tags:FILE